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- W2960189255 abstract "We studied the scattering problem of two distinguishable atoms with unequal mass, where one atom (atom $ensuremath{alpha}$) is trapped in a quasi-one-dimensional (quasi-1D) tube and the other one (atom $ensuremath{beta}$) is localized by a 3D harmonic trap. We show that in such a system if atom $ensuremath{alpha}$ is much heavier than $ensuremath{beta}$, confinement-induced resonance (CIR) can appear when the 3D $s$-wave scattering length ${a}_{s}$ of these two atoms is much smaller than the characteristic lengths (CLs) of the confinements, for either ${a}_{s}>0$ or ${a}_{s}<0$. This is quite different from the usual CIRs which occur only when ${a}_{s}$ is comparable with the CL of confinement. Moreover, the CIRs we find are broad enough to serve as a tool for the control of effective interatomic interaction. We further show the mechanism of these CIRs via the Born-Oppenheimer approximation. Our results can be used for the realization of strongly interacting systems with ultracold atoms with weak 3D background interaction (i.e., small ${a}_{s}$), e.g., the realization of ultracold gases with strong spin-dependent interaction at zero magnetic fields." @default.
- W2960189255 created "2019-07-23" @default.
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- W2960189255 date "2019-12-04" @default.
- W2960189255 modified "2023-10-17" @default.
- W2960189255 title "Confinement-induced resonance with weak background interaction" @default.
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- W2960189255 doi "https://doi.org/10.1103/physreva.100.063607" @default.
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